Liquid and gas mixing nozzle



Oct. 15, 1940. w. w WAISNER El AL 2,217,975

LIQUID AND GAS MIXING NOZZLE Filed Sept. 4, 1937 INVENTOR YYard. )Y, Waisner 6 Mu'rreZ )Y. Martin Nzlson B. Lantz ATTORNEYS.

Patented Oct. 15, 1940 PATENT OFFECE LIQUID ANDGAS MIXING NOZZLE Ward W. Waisner, M'urrel W. Martin, and Nelson B. I antz, Indianapolis, Ind.

Application September 4, 1937, Serial No. 162,433

1 Claim.

Our invention relates to improvements in liquid and gas mixing nozzles adapted primarily for mixing with a previously mixed supply of air and gas, a supply of atomized fuel oil orthe like to provide a fuel mixture which, upon being burned, will produce a luminous flame.

One of the objects of our invention is to provide a fuel burner of the above character wherein the luminous material is intimately mixed with the mixture of air and fuel gas prior'to the discharge thereof from the nozzle of the burner.

Another object of our invention is to provide a means whereby a secondary supply of mixed air and gas'will be delivered to the fuel mixture prior to the delivery of the mixture from the nozzle.

A still further object of our invention is to provide a liquid burning nozzle having the above characteristics which may be cheaply constructed and which is so assembled that it may be readily taken apart for the purpose of inspection and repair.

Forthe purpose of disclosing our invention, we

have illustrated an embodiment thereof in the.

accompanying drawing, in which:

Fig. 1 is a longitudinal sectional view, certain parts appearing in full, of an embodiment of our invention;

Fig. 2 is an end elevation of the structure illustrated, looking toward the right-hand end of Fig. 1; and

Fig. 3 is a transverse sectional View taken on the line 3-3 of Fig. 1.

In the structure illustrated, we provide a substantially cylindrical central body portion l at one end of which is formed an annular flange 2. The exterior periphery of flange 2 is threaded to carry a secondary nozzle element 3 which is provided at its free end with a discharge opening Threadedly mounted on the inner face of flange 2 is a cylindrical element 5 which carries, at the end opposite that of flange 2, a primary nozzle 6. Nozzle 6 is provided with an opening 1 adjacent opening 4 of nozzle 3. As is clearly shown in Fig. 1, nozzle 6 and opening 4 are respectively of somewhat smaller diameter than nozzle 3 and opening 4, thus forming a mixing chamber to be more fully described later. A series of ports 8 are formed in the wall of cylinder 5 to provide communication between the chamber and an air intake pipe 9 suitably mounted in body portion l and connected to any desired air supply. A cast intake base It is provided with a recessed annular flange II which abuts body portion l, opposite the end which carries port 20.

n'ozzl'e' and. is secured thereto by a suitable means such as bolts l2. Base I0 is so formed as to provide a gas chamber In. Formed on the outer face of base W are two bosses l3 and [4,

each being internally threaded to respectively 5 for the regulation of the flow of the luminating 10 hydrocarbons. Mounted within base l0 and extending through body portion l and the cylindrical element 5 is an oil tube I9. Tube I9 communicates directly with oil intake l6 and at its free end is closed with the exception of a small 15 The discharge end of tube I9 carries a somewhat enlarged spray nozzle 2| having therein a substantially cone-shaped opening 22, said opening 22 cooperating with port 20 to form a spray outlet for the luminating hydrocarbons. 20

Due .to the enlargement of spray nozzle 2i a shoulder 2| is formed which tends somewhat to retard the passage of an airrgas mixture through opening I. Surrounding tube I9 is asecond tube 23 the inner diameter of which is somewhat larger than the outer diameter of tube [9, thus forming a gas passage 24 communicating through chamber ID with the gas intake pipe l5. Tube'23 is threadedly mounted at one end in base I0 and at the other end on a reduced 30 portion 25 of spray nozzle 2|. Tube 23 is also provided with a series of escape ports 26 which allow gas to pass into a mixing chamber 21 formed between the inner face of nozzle 6 and the outer face of tube 23. A second mixing chamber 28 is formed between the outer face of nozzle 6 and the inner face of nozzle 3.

The operation of the luminous flame burner is as follows:

Air enters through intake pipe 9 at a pressure 40 varying from slightly in excess of atmospheric to as great as five (5) pounds gauge and due to its kinetic energy will flow through and around mixing chamber 21 where it mixes with the gas before being discharged through opening 45 1. Air also passes through ports 8 into chamber 28 which air will further mix with the products discharged through opening I before finally being discharged through opening 4.

Natural or manufactured gas is introduced 5 through intake pipe [5 at a pressure varying from slightly in excess of atmospheric to as high as fifty pounds gauge. The gas passes through chamber 10 into passage 24 and through ports 26 into the mixing chamber 21 at which point 55 it mixes with the air before being discharged through nozzle opening 1. A further mixing is accomplished in chamber 28 before the combustion mixture is discharged through nozzle opening 4.

Luminating hydrocarbons are introduced through intake pipe 16 in the form of commercial grades of fuel oil, or if desired, in the form of bottled gases such as those consisting principally of propane, butane or the like and enter one end of the tube 19. The luminating hydrocarbons pass through tube [9 and emerge through opening 23 of tube i9 and opening 22 of spray nozzle 2!.

We claim as our invention:

In a liquid fuel and gas burner, in combination, a liquid fuel supply pipe having an atomizing discharge nozzle at its end, a gas fuel supply pipe surrounding the liquid fuel pipe and having discharge openings rearwardly spaced from said discharge nozzle, a mixing chamber surrounding mixing chamber from said mixing chamber, and

-a second chamber surrounding said first-mentioned chamber communicating with said firstmentioned chamber at a point spaced rearwardly of the discharge openings in said gas fuel supply pipe and having a discharge opening spaced forwardly of the discharge opening in saidfirst-mentioned chamber and of greater diameter than the discharge opening of said first-mentioned chamber.

WARD W. WAISNER. MURREL W. MARTIN. NELSON B. LAN'IZ. 

